World Congress 2026 Europe • Jul 9, 2026 • Session details

200 OK: Payment settled, resource delivered

Proposed in 1993, the HTTP 402 status code sat unused for decades. Now, the x402 protocol revitalizes it to enable instant, secure payments for autonomous AI agents.

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#1 about 1 min

Autonomous AI agents and the need for digital payments

AI agents require programmatic ways to buy and sell resources online.

#2 about 1 min

Core requirements for machine-to-machine payment settlements

Agentic commerce relies on atomic, programmable, and permissionless transaction finality.

#3 about 2 min

History and intent behind the HTTP 402 status code

Originally proposed to enable web-native charging, the payment required status remains mostly non-standard.

#4 about 2 min

Adoption and metrics of the X402 payment protocol

A neutral standard under the Linux Foundation is already driving millions of autonomous AI transactions.

#5 about 2 min

Extending the client-server model with payment facilitators

The X402 standard introduces varied payment models including exact, up-to, and batch authorizations.

#6 about 6 min

Sequence diagram for executing X402 infrastructure requests

The X402 workflow shows how clients, servers, and facilitators resolve payment requirements to deliver resources.

#7 about 2 min

Implementing usage-based pricing through monetization gateways

Platforms like Cloudflare use X402 to charge AI agents directly via peer-to-peer stablecoin transfers.

#8 about 2 min

Blockchain scale and compliance for agentic commerce

Networks must support high transaction throughput and provide compliant token controls like freezing and clawbacks.

#9 about 5 min

Securing blockchain primitives against quantum computing threats

The cryptographic agility model aims to protect digital signatures from emerging algorithms capable of breaking elliptic curves.

#10 about 3 min

Alternative payment rails and transaction simulation logic

Handling massive agentic transaction scale requires robust alternative payment rails and effective node simulation strategies.

Matching moments

10:56 min

Monetizing autonomous agent interactions with HTTP 402 payments

Coffee With Developers

2:47 min

Transitioning toward autonomous agentic commerce

Annabella Bassler

Annabella Bassler +3 · WWC Europe 2026

58 sec

Introducing the X402 protocol and its core architectural components

Ed Marquez

Ed Marquez · WWC Europe 2026

4:50 min

Preparing for autonomous interactions and protocol-level stablecoin payments

Chris Heilmann +2 · LIVE

5:46 min

Funding agent capabilities using machine-to-machine microtransactions

Benjamin Smith

Benjamin Smith · WWC Europe 2026

2:42 min

Specific payment requirements for autonomous artificial intelligence agents

Brian Whippo

Brian Whippo · WWC 2025

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